Loehr, W., & .Powelson, J. P. (1981). The economics of development and distribution. Harcourt Brace Jovanovich.
Lua i Stíl Chicago (17ú heag.)Loehr, William, agus John P. .Powelson. The Economics of Development and Distribution. New York: Harcourt Brace Jovanovich, 1981.
Lua MLA (9ú heag.)Loehr, William, agus John P. .Powelson. The Economics of Development and Distribution. Harcourt Brace Jovanovich, 1981.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.